Improvement in mechanicati motion



` and diluted tudes aient @Mitte Letters Patent No. 105,951, datedAugust 2, 1570,

IMPROVEMENT IN MECHANICA'E MOTION.

4 www- The Schedule referred to in these Letters Patent and making partof the saine.

To all whom it may concern:

Beit known that I, ANDREW KLOMAN, of Pittsburg, inthe county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement` in Mechanical Motion; and I do hereby declare' thefollowing to be a full, clear, and exact description thereof, referencebeing had to the accompzltnyling drawing makinga partof thisspecication, in wnc1v l Figure 1 is a perspective view, partly in,section, of my improvement in devices for varying at pleasure the lengthof a plunger or ram, or other reciprocating mechanical device.

Figure 2 is a longitudinal vertical section thereof,

Figure 3 shows in plan view the under side of the plungeroriram, and thegrooved double eccentric adjusting-block.

Like letters of reference indicate like parts in each.

In some mechanical movements, such as in bending and straightening barsof iron, upsetting the ends of iron rods and bars, it is sometimesdesirable to vary the length of the ram, plunger, or other part of themachine, having a reciprocating motion, in consequence oi' the varyinglength or thickness of the material to be operated on, or from othercauses.

My invention has this for its object, and the nature of it consists incombining with a divided plunger, or other'reciprocatin g device, adouble eccentric grooved shifting block, with suitable connections, sothat the shifting of the latter will lengthen or shorten the To enableothers skilled in the art to make and use my invention, I will proceedto describe its construction and mode of operation.

The frame-work b is of' any desired or convenient construction.

By a cam or eccentrie working in a yoke or box,

l a', or by other equivalent device for such uses, a reciprocatingmotion is imparted to the plunger c o, which plunger, in'thisdescription, may represent any ruechanicai device which is designed tooperate with a reciprocating or forward-and-back motion.

This plunger I make in two parts, the one, c, being attached to thecam-yoke a', and the other, c', being the means through which power ormotion, or both, is conveyed directly or through other devices to thework to -be done. y

The adjacent ends are grooved, as at n n', the

grooves having a slight curvature corresponding to that of the groovesor flanges of the shifting block d. This block d has in one place, at ashort distance from its center, and on opposite sides, two eccentricgrooves, m in', so arranged with reference to each other that the pointsof greatest and least eccentricity shall be directly opposite eachother.

The block :Z is then so connected with the plunger c c' that the flangess s shall enter the grooves 4in an', n n of the other.

It is there held in place by a holt and nut c, the

- bolt having a square shank, c, which plays in a slot,

f, in the hearing-plate b' of the frame b, the slot vbeing of a lengthat least equal to the length of stroke of the ram.

The head c of the holt comes against the lower face of the plate b'.

A handle, g, or other suitable device, is attached to the block d,[forconvenience in turning it, and so varyingfrthe length of' the ram c c';and by length, in this connection, I mean the distance from its'operative end or point to the point of its connection with the cam-yokea' or other operative device.

The block dV turns freely on its bolt e.

It will now be observed that, by turning the block so that the groovesand flanges of the plungers c c shall occupy the flanges and grooves of'the block d at their points of least eccentricity, the adjacent ends oi'the divided ram c c' will he brought nearer together, and the length ofthe ram correspondingly shortened, and vice corsa. i

Hence, in order to change the relative position of the operative end ofthe divided ram, itis only necessary to shift the block either way,according as it may be desired to make such operative point at a greaterdistance from or 4nearer to the point of connection with the cam-yoke,the object, however,

being, in most cases, to change the operative endor point of the plungeror ram with reference to the material to be operatedon. or the functionto he performed.

The same object can be secured by the use ofa single eccentric grooveinstead of two such grooves as described, the other being made with auniform radius.

Also, the groove or grooves, instead of being made eccentric in arotating block, as described, may be made in a sliding box, straight andconverging toward either end, and, in such case, the grooves in theadjacent ends of the divided plunger c c' should be made straight andwith a corresponding inclination. v

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The mode of increasing or lessening the operative length of a dividedreciprocating mechanical device, by means of grooves eccentricallyarranged in a rotating block vor converging in a sliding block, incombination with ahea-ded square-shanked bolt, opsueh grooves engagingcorrespondingly eurved or erating in a slot, f, substantially asdescribed. inclined grooves in the adjacent', ends ot' the divided Intestimony whereof, I, the said ANDREW KLO- reciprocating device,Substantially as described. MAN, have hereunto set my hand.

2. A rotating block, il, having a pair ot' grooves, ANDREW KLOMAN. oneat least ot' which is eccentric, in combination Y with the dividedplunger c e', substantially as de- Witnesses: scribed. WVM. B. NEEPER,

3. Vlhe subject-matter of tlielast preceding claim, R. C. WRENSHALL.

